Automatic heat control sprinkler head



v Sept. 26, 1950 CAMERON 2,523,355

AUTOMATIC HEAT CONTROL SPRINKLER HEAD Filed Oct. 5, 1947 Inventor GlenH. Cameron 2mm W Patented Sept. 26, 1950 AUTOMATIC HEAT CONTROLSPRINKLER HEAD Glen H. Cameron, Mattoon, Ill. Application October 3,1947, Serial No". 777,697

resilient means urging the said means against the said arms, whereby,upon fracturing the fusible material bond as influenced by thermalconditions, a liquid will be emitted.

Another purpose of this invention is to pro- Claims. (01. 169-37) videantivibration means in connection with the 1 valve closure retainingmeans.

Another object of this invention is to provide an extremely simple,efiicient device of the nature to be described which lends itself wellto commercial manufacture.

Ancillary objects and features of novelty will become apparent to thoseskilled in the art, in following the description of the preferred formof the present invention, illustrated in the accompanying drawings,wherein:

Figure 1 is an elevational side view of the preferred form of thepresent invention;

Figure 2 is an elevational view of the invention shown in Figure 1,portions being broken away in section to illustrate details ofconstruction and showing the device in the second position of operation;

Figure 3 is a plan view of the invention shown in Figure 1;

Figure 4 is a perspective exploded view of the valve plates utilized inconjunction with and forming a part of the present invention.

Referring now in detail to the illustrated preferred embodiment of thepresent invention, like reference characters are used throughout toindicate similar elements thereof.

This invention has been conceived and developed to provide a device forimproved functioning and actuation of sprinkler systems utilizedcommercially throughout building structures and the like. In order toobviate the use of but a single strand or bead of fusible material as aclosure bond, the present invention has been developed which provides anincreased surface area for use in retaining a fusible material,thermally responsive at a predetermined temperature.

A bonnet I0 is provided with an externally threaded inlet I2 which isadapted to be secured to a suitable liquid supply, such as a Water mainor the like. This bonnet l0 also has a partition l4 extendingthereacross with an aperture l6 at substantially the longitudinal centerthereof.

A pair of valve plates or disks !8 and 20, respectively, are provided,the said disk 18 being adapted to seat in the aperture or bore of thesaid inlet means l2., Of course, a reduced portion may be provided inassociation therewith for firm seating within the said hole. The saidvalve plate 20 also has areduced portion at the upper extremity orsurface thereof with .an aperture 22 therein for a purpose to .bedescribed hereinafter.

A pair of bosses 24 and 26, respectively, are provided integral with thesaid bonnet 10, while pivot pins 28 and 30 extend therethrough. A pairof arms 32 and 34, respectively, are secured 'to each pivot pin andextension plates 36. and 38, respectively, extend at right angularrelation relative to each arm 32 and 34. These plates are secured infixed position through the utility of a conventional fusible material.

A'rod generally indicated .at 4|] is provided through a suitableaperture 42 in the upper portion of the said bonnet Ill and proceedsthrough the said aperture 16 in the partition I4. This rod is preferablycomposed of a sleeve 44 having a slot 45 at the upper portion thereof.The said sleeve is also preferably internally threaded for the purposeof receiving an arm 48 in adjustable position in the said bore thereof.Of course, a suitable nut 50 and washer 52 may be utilized inassociation with securing the said arm 43 in the selected adjustedposition relative to the sleeve 44.

Means for resiliently biasing the arm 48 relative to the valve plate isprovided. This means is preferably a spring 52 seated on a suitablewasher 54 which is positioned on the partition l4 and a second washer 56engageable with the lower surface of the said nut 50. It is quiteobvious that by utility of this expedient the slot 46 is constantlyurged against a selected extension plate 36, against the bond of thesaid fusible material. 7

It will be noted from an inspection of Figure 2 that the lower extremityof the arm 48 is preferably conical, engaging the aperture 22 of theupper valve plate 20.

The operation of the present invention is deemed obvious from theforegoing. At a pre determined temperature, the bond holding the 3 plateextensions 36 and 38 together is broken, thereby permitting theresilient means 52 to urge the rod 48 in out-of-contact relation withthe valve plates. The Water pressure in the system will also urge theplates from their seats, thereby effecting sprinkling. The slot 46engageable with the plate extension 36 effects an anti-twist andanti-vibration means and also assists in the operation and actuation ofthe invention.

It is apparent that variations may be made herein without departing fromthe spirit of the invention. Accordingly, limitation is only inaccordance with the scope of the following claims.

Having described the claimed as new is:

1. A sprinkler apparatus comprising a bonnet having a platform therein,an inlet engageable with a liquid source of supply, detachable valvemeans associated with said inlet, means extending through said platformfor actuating said valve means at a predetermined temperature, saidvalve actuation means including a sleeve associated with said bonnet, agroove in said sleeve and a shank adjustably secured to said sleeve,arms pivoted to said bonnet, one of which is engageable in said slot,fusible means for retaining said arms in a predetermined position, meansseated invention, What is on said platform for resiliently biasing saidsleeve, and said shank engaging said detachable valve means.

2. In a sprinkler apparatus, a bonnet, an inlet in said bonnet adaptedto be secured to a liquid supply line, valve plates associated with saidinlet, thermal responsive means for actuating said valve means, saidactuation means including a sleeve and an aperture in said sleeve, a rodin said aperture, arms pivoted to said bonnet, fusible means forretaining said arms in engagement with said rod and resilient means forretaining said'rod in engagement with said valve plates, means forpreventing rotation of said rod relative to said bonnet, and saidresilient retaining means comprising a spring. I K

3. In a sprinkler apparatus, a bonnet, an inlet in said bonnet adaptedto be secured to a liquid supply line, valve plates associated with saidsought inlet, thermal responsive means for actuating said valve means,said actuation means including a sleeve and an aperture in said sleeve,a rod in said aperture, arms pivoted to said bonnet, fusible means forretaining said arms in engagement with said rod and resilient means forretaining said rod in engagement with said valve plates, means forpreventing rotation of said rod relative to said bonnet, said resilientretaining means comprising a spring, and said rotation preventing meansincluding a slot in said rod engaging a selected arm.

4. In a sprinkler apparatus, a bonnet having a liquid inlet, a valvemember disposed in the inlet closing position, a rod slidably carried bysaid bonnet and in separable engagement with said valve member, a springreacting on said bonnet and saidrod constantly urging said rod away fromsaid member, and fusible means carried by said bonnet for retaining saidrod against said valve member against the biasing force of said springincluding a pair of arms pivoted to said bonnet and connected togetherby a fusible material.

5. In a sprinkler apparatus, a bonnet having a liquid inlet, a valvemember disposed in the inlet closingposition, a rod slidably carried bysaid bonnet and'in engagement with said valve member, a spring reactingon said bonnet and said rod constantly urging said rod away fromREFERENCES CITED The following references are of record in the file ofthis patent:

, UNITED STATES PATENTS Number Name Date 278,219 Brown May 22, 1833332,041 Bishop Dec. 8, 1885 494,604 Slocum Apr/4, 1893 1,891,909 'BillSetal. Dec. 27, 1932

